Currently, the cheapest month to rent a car at Asahikawa Airport is April. The most expensive time to rent a car is July. The cheapest prices for each month are shown above, but prices will vary based on availability, how far out you book your rental car, and of course, car type.
JR Rent a Car
JR Hokkaido Rent a Car
keddy by Europcar
Yes, you can rent a car for a month at Asahikawa Airport check Cheapflights for the latest prices and car type availability.